发明名称 |
PARTIAL BEAMFORMING |
摘要 |
In accordance with the principles of the present invention, advantage is taken by the inventors of the fact that the speed of operation of the digital hardware in a digital beamformer can be reduced by providing, for example, multiple phases of the data signals and then processing the multi-phase data in N parallel summing paths. An interpolation-decimation filter receives the multi-phase data from the N parallel summing paths and provides at its output a signal having a reduced data rate (1/N). In accordance with this technique, the speed of operation of the individual digital circuits for forming the required beamforming delays is not increased as compared to conventional post-beamforming interpolation schemes, so that hereby the effective data rate is increased by a factor N and results in a decrease of the delay quantization error by a factor N. In accordance with the principles of the invention, the interpolation-decimation filter is incorporated into the beamformer at a most advantageous place. That is, it is incorporated into the beamformer processing after partial beamforming of a group of receive channels and before formation of the final beam. This approach allows the final beamforming to be simple and performed at a relatively low data rate and allows the higher rate signal processing to be confined to circuitry which may advantageously be on a single type of integrated circuit which is repetitively used in the beamformer. |
申请公布号 |
WO9423422(A1) |
申请公布日期 |
1994.10.13 |
申请号 |
WO1994US02818 |
申请日期 |
1994.03.16 |
申请人 |
SIEMENS MEDICAL SYSTEMS, INC.;MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KIM, JIN;YAO, LIN XIN;BANJANIN, ZORAN;FUKUKITA, HIROSHI;HAGIWARA, HISASHI;KAWABUCHI, MASAMI |
分类号 |
G01V1/00;A61B8/00;G01N29/06;G01N29/44;G01S7/523;G01S15/89;G10K11/34;(IPC1-7):G10K11/34 |
主分类号 |
G01V1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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